/*
 Violet - A program for editing UML diagrams.

 Copyright (C) 2007 Cay S. Horstmann (http://horstmann.com)
 Alexandre de Pellegrin (http://alexdp.free.fr);

 This program is free software; you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
 the Free Software Foundation; either version 2 of the License, or
 (at your option) any later version.

 This program is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 GNU General Public License for more details.

 You should have received a copy of the GNU General Public License
 along with this program; if not, write to the Free Software
 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

package com.horstmann.violet.framework.userpreferences;

/**
 * Interface for services storing and loading user preferences.
 */
interface IUserPreferencesDao
{

    /**
     * Gets a previously stored string from the service.
     * 
     * @param key the key of the string
     * @param defval the value to return if no matching value was found
     * @return the value stored with the given key, or defval if none was found
     */
    public abstract String get(PreferencesConstant key, String defval);

    /**
     * Saves a key/value pair for later retrieval.
     * 
     * @param key the key of the string to be stored
     * @param value the value to to be stored
     */
    public abstract void put(PreferencesConstant key, String value);

    /**
     * Resets all preferences
     */
    public abstract void reset();

}
